<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .re {
      display: none;
      width: 200px;
      height: 200px;
      background-color: bisque;
    }

    .re1 {
      background-color: red;
      width: 200px;
      height: 200px;
    }
  </style>
</head>

<body>
  <div class="re">1</div>
  <div class="re1">2</div>
</body>

</html>